Improvement in sash-fasteners



JOHN K. CLARK, OF BUFFALO, NEW YORK.

IMPROVEMENT IN SASH-FASTENERS.

Speciiication forming part of Letters Patent No.

162,0'3 l, dated April 13, 1875 application led March 4, 1875.

To all whom it may concern:

Be it known that I, JOHN K. CLARK, of Buffalo, in the county of Erie and'State of N ew York, have invented a certain new and ImprovedWindow-Sash Lock, of which the following is a specification:

This invention is illustrated in the accompanying drawing, in which-Figure l represents an inside view of a window provided with my lock.Fig. 2 is a tiansverse section ofthe same.

Similar letters indicate corresponding parts.

This invention consists in a reversible angular gravitating latch, whichis hinged to the sash, in combination with a double-inclined stop, whichis fastened to the window-frame by a single screw, or its equivalent, insuch a manner, that when the sash is raised or lowered, thegravitating-latch, on reaching the stop, slides up on its inclined sideand drops in gear with the stop by its inherent gravity, thus lockingthe sash automatically in its closed or in its raised position.

The stop is, by preference, made with a double incline, so that it canbe used on either side of the window-frame, and also at an intermediateposition for retaining the sash partly raised. n

The gravitating latch 1s retained 1n 'position by a slottedsocket-piece, which allows of reversing the latch, so that it can beused on either side of the window.

In the drawing, the letter A designates my gravitating latch, whichconsists of an angular lever, made ot cast or malleable iron, or of anyother suitable material, and provided at one end with two gudgeons, a,which can be made to engage with a slotted socket-piece, B, so that whensaid socket-piece is secured to the sash G, the latch is free to swingup and down.

The socket-piece and the latch are so formed that the latch can bereadily reversed and applied. on either side of the window frame withoutrequiring any change in form or construction.

Said latch may, however, be hinged to the sash by any suitable meanswhich will allow the same to swing freely up and down.

The latch is attached to the sash in such a position that its free endis close to the side of the window-frame D, and to said windowframe aresecured two or more stops, E E', the sides of which are inclined, andwhich are provided with recesses b for the reception of the latch.

When said latch is permitted to follow its inherent gravity, it fallsdown as far as its socket-piece or hinge will allow, and it the sash israised, the latch, as it strikes the inclined side of the upper stop E,slides upon this incline, and then it drops in gear with the recess b,and thereby the sash is retained in its raised position.

A thumb-piece or handle, c, formed on the latch, serves to raise thesame out of gear with the stop. Y

When the sash is to be closed, the latch is disengaged from the Lipperstop E', and as the sash descends, the stop slides up on the inclinedside of the lower stop E, and drops in gear with the recess of thisstop, as shown in the drawing, and thereby the sash is locked in itsclosed position, so that it cannot be raised from the outside.

The stops E E are made with double inclines, one on each side of therecess b, so that the same can be used on eithery side ot' thewindowframe, or that the gravitating latch will engage with the stop ineither direction, if said stop is secured in an intermediate positionfor the purpose of retaining the sash partly raised.

In those stops which retain the sash when the same is closed, or when itis raised clear up, only one inclined side comes into action, and saidstops might be cast with a single incline; or a recessed stop might beformed in any manner suitable to receive the gravitatin g latch.

By constructing the stop with double inclines, however, I am enabled tosecure the same in position by a single screw, each of the inclinesbeing provided on its rear edge with a spur, whereby the stop, afterhaving been secured by a screw, is prevented from turning round, or frombeing thrown out of its proper position.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a window-sash lock, the stop E, provided with double inclines, andwith a recess,

b, attached by a single screw, or its equivalent, have hereunto set myhand and seal this 25th substantially as shown and described. day ofFebruary7 1875.

2. The combination of a. reversible angular gravitating 1atch,A,haviuggudgeons a, with JOHN K CLARK' [1 S'] a slotted or recessedsocket-piece, B, substsm- Witnesses: tiaily as and for the purposesspecified. C. B. CLARK,

111 testimony that I claim the foregoing I E. L. FERGUSON.

